Perhaps you should try some spelling variations:
thanh vi » hanh vi, thanh va, thanh ve
cau tren » cu tren, dau tren, ca tren
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
tuc gia » tac gia, duc gia, toc gia
tu cam » tu cham, tu nam, tu can
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
vi cau » va cau, ve cau, di cau

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cam) OR (tu cac)) ky nang ((ma hoi) OR (mai hoi)). hieu ve cam tuc gia thanh vi cau tren~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cam) OR (tu cac)) ky nang ((ma hoi) or (mai hoi)). hieu ve cam tuc gia thanh vi cau tren~".
• Adding a wildcard symbol may retrieve word variants: ((tu cam) OR (tu cac)) ky nang ((ma hoi) or (mai hoi)). hieu ve cam tuc gia thanh vi cau tren*.